Open-Source CI / CD Automation Engines

Jenkins is the venerable standard for self-hosted automation, offering over 1,800 community plugins to automate building, testing, and multi-stage containerized deployments through declarative Groovy Jenkinsfiles.

A declarative, GitOps continuous delivery tool for Kubernetes that continuously reconciles cluster state against Git repositories, delivering automated rollouts, health status visualizers, and instant rollbacks.

A powerful, Kubernetes-native open-source framework from the CD Foundation that defines CI/CD pipelines as Kubernetes Custom Resource Definitions (CRDs), running each build step inside isolated, ephemeral pods.

A modern, container-first continuous integration platform written in Go where every pipeline step executes inside an isolated Docker container configured with a simple, declarative YAML syntax.

A 100% community-driven fork of Drone CI that stays true to open-source software, providing lightweight container-based pipeline runners with native support for GitHub, GitLab, and Gitea.

The self-hosted open-source distribution of GitLab provides a complete DevSecOps platform with battle-tested CI/CD runners, container registry integration, and YAML-driven build matrix pipelines.